Field Notebook: NJ, MT, WY, ND 1999

FIELD

BOOK

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INDEX OF

CURVE AND REDUCTION TABLES

Table I—SLOPE STAKE

Table II—STADIA CORRECTION AND HORIZONTAL DISTANCES
Table Ill—TRIGONOMETRIC FORMULAE
Table TV-NATURAL TRIGONOMETRICAL FUNCTIONS
CURVE FORMULAE

Table V-TANGENTS AND EXTERNALS TO A 1° CURVE
USEFUL RELATIONS

Table VI-INCHES TO DECIMALS OF A FOOT
Table VH—MINUTES IN DECIMALS OF A DEGREE
Table VIII—MIDDLE ORDINATES OF RAILS
Table IX-S1IORT RADIUS CURVES

Table X-RODS IN FEET, 10THS AND 100THS OF FEET
Table XI—LINKS IN FEET, 10TIIS AND 100THS OF FEET

FIELD BOOKS

r -

SOKKIA"

Rain-resistant fine quality ledger paper, bound in high-
visibility durable yellow imitation leather. Printed in
waterproof ink.

Stock No. 8152-00 Transit Field Book. Size 47= x 7 1 A
inches.

Stock No. 8152-05 Economy Field Book. Spiral bound,
Paperback. Size 4’/2 x 7'A inches.

Stock No. 8152-10 Economy Field Book. Same as above
except saddle stitched (stapled).

Left page blue horizontal lines; red vertical lines.

Right page 4 horizontal and 8 vertical blue lines; red
vertical center line.

Stock No. 8152-20 Mining Transit Book. Size 4'/2 x 7 1 A
inches.

Left page blue horizontal lines; red vertical center line.
Right page 8x8 blue lines; red vertical lines.

Stock No. 8152-30 Engineers Field Book. Size 4 V 2 x 7'A
inches.

Left page blue horizontal lines; red vertical lines.

Right page 10 x 10 blue lines; red vertical center line. Inch
lines heavy.

Stock No. 8152-50 Level Book Size 4 x 6 V 2 inches.

Stock No. 8152-55 Level Book Size 4 V 2 x 7’A inches.

Both pages blue horizontal lines; red vertical lines. 6
vertical columns.

Stock No. 8152-60 Field Book. Size 4’A x 7’A inches.

Left page blue horizontal lines; red vertical lines.

Right page 4x4 blue lines; red vertical center line.

Stock No. 8152-75 Cross Section Book. Size 6 '/a x 8'A
inches.

Both pages 10 x 10 blue lines; inch lines slightly heavier.

Stock No. 8152-80 Duplicating Transit Book. Size 4'A x
7’A inches.

Left page blue horizontal lines; red vertical lines.

Right page 4 horizontal and 8 vertical blue lines; red
vertical center line. Pages numbered and
perforated. Carbon paper.

CURVE FORMULAE

D = Degree of Curve
1° = 1-Degree of Curve
2° = 2-Degree of Curve

P.C. = Point of Curve
P.T. = Point of Tangent
PI. = Point of Intersection

I

T

E

R

L.C

M

c

= Intersection of Angle, Angle
between Two Tangents
= Length of Curve,
from P.C. to P.T.

=Tangent Distance
= External Distance
= Radius

= Length of Chord
= Length of Middle Ordinate
= Length of Sub-Chord
= Angle of Sub-Chord

L.C.

R =

L.C.

2

2 sin £ I

T = R tan £ I =
I

L.C.

2 cos £ I

= R sin -y, D 1° = R = 5730, D 2° =

5730

» D =

5730

R

M = R (1 — cos £ I), = R — R cos

I

R

R

= sec

R - M
R

I

c = 2 R sin £ d, d = —
zK

L.C. = 2 R sin £ I, E = R (sec £ I — 1), = R sfec ^ — R

Minutes in Decimals of a Degree

V

■0167

11'

•1833

21'

■3500

31'

■5167

41'

■6833

51 '

•8500

2

•0333

12

•2000

22

•3667

32

•5333

42

•7000

52

•8667

3

•0500

13

•2167

23

•3833

33

•5500

43

■7167

53

•8833

4

•0667

14

•2333

24

■4000

34

•5667

44

•7333

54

•9000

5

■0833

15

•2500

25

•4167

35

•5833

45

•7500

55

•9167

6

•1000

16

•2667

26

•4333

36

•6000

46

•7667

56

•9333

7

- r - 1 1 67

17

•2833

27

•4500

37

•6167

47

•7833

57

•9500

8

•1333

18

■3000

28

■4667

38

•6333

48

■8000

58

•9667

9

•1500

19

■3167

29

■4833

39

•6500

49

■8167

59

■9833

10

•1667

20

■3333

30

■5000

40

•6667

50

•8333

60

1-0000

Inches in Decimals of a Foot

-k

4

A

i

A

f

£

*

1

i

■0052

•0078

•0104

■0156

•0208

■0260

■0313

•0417

•0521

•0625

•0729

1

2

3

4

5

6

7

8

9

to

u

•0833

•1667

■2500

•3333

•4167

•5000

•5833

•6667

•7500

•8333

•9167

SOKKIA’

'

j

p I

MADE IN U.S A.